Coupling device for motor vehicle door lock and motor vehicle door lock

Abstract

The utility model relates to a connecting device for a motor vehicle door lock and the motor vehicle door lock comprising the connecting device. The coupling device includes a first wheel assembly, a second wheel assembly, and a control assembly. The first wheel assembly comprises a first wheel, a first inhaul cable and a second inhaul cable, wherein at least parts of the first inhaul cable and the second inhaul cable are wound on the first wheel in the first direction and the second direction respectively, and the second direction is opposite to the first direction. The second wheel assembly comprises a second wheel and a third inhaul cable which is at least partially wound on the second wheel in the first direction, and the second wheel and the first wheel are coaxially arranged and constructed to be capable of being connected with the first wheel; the control assembly is coupled to the second wheel; when the second wheel is connected with the first wheel, the third inhaul cable can act on the door lock body. According to the connecting device, the unlocking function of the inner side door handle and the outer side door handle can be conveniently controlled through a simple structure, the cost is saved while the requirements of users are met, and the structural complexity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor vehicle locks, in particular to a connecting device for a motor vehicle door lock and a motor vehicle door lock comprising the connecting device. Background Art

[0002] With the vigorous development of the automobile industry, users have higher and higher requirements for the intelligence and quality of automobile control, and the cost-effectiveness competition in the automobile market has become increasingly fierce. As an indispensable and important component of automobiles, car door locks play an increasingly important role. In order to meet user requirements such as driving safety, car door locks have more and more functions, such as electric unlocking, central locking, child lock functions, etc.

[0003] In the prior art, users usually choose to install electric unlocking with a central control function for the purpose of preventing robbery or theft. The door is locked when passengers enter or leave the car, so that the door handle cannot open the door. Commonly used electric unlocking with a central control function is usually a mechanical structure or an electronic structure with a control circuit, which is large in size, complex in structure, and has high manufacturing and maintenance costs. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above problems and / or other problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, according to one aspect of the utility model, a coupling device for a motor vehicle door lock is provided, wherein the door lock comprises a door lock body, and the coupling device comprises a first wheel assembly, a second wheel assembly and a control assembly. The first wheel assembly comprises a first wheel, a first cable at least partially wound around the first wheel along a first direction, and a second cable at least partially wound around the first wheel along a second direction, the second direction being the opposite direction of the first direction, the first cable being suitable for connecting to an inner control member for controlling the door lock body, and the second cable being suitable for connecting to the door lock body; the second wheel assembly comprises a second wheel and a third cable at least partially wound around the second wheel along the first direction, the second wheel being coaxially arranged with the first wheel and being configured to be engaged with the first wheel, and the third cable being suitable for connecting to an outer control member for controlling the door lock body; the control assembly is connected to the second wheel to control the engagement of the second wheel with the first wheel; wherein when the second wheel engages with the first wheel, the action of the third cable can be transmitted to the door lock body.

[0006] According to one embodiment of the utility model, one of the first wheel and the second wheel is provided with a key portion protruding axially outward, and the other is provided with a key slot recessed axially inward, and the first wheel and the second wheel are engaged and rotated synchronously by inserting the key portion into the key slot.

[0007] According to one embodiment of the utility model, the control component includes a motor arranged on one side of the second wheel and a cam connected to the output shaft of the motor, and the cam abuts against the side surface of the second wheel away from the first wheel to drive the second wheel to move toward the first wheel and insert the key portion into the key slot.

[0008] According to an embodiment of the present invention, the control assembly further comprises a third reset member connected between the first wheel and the second wheel, and the third reset member is configured to disengage the key portion and the key slot in an engaged state.

[0009] According to one embodiment of the utility model, the first wheel is provided with a first groove and a second groove extending along its circumferential direction side by side along its axial direction, the first cable is at least partially wound in the first groove, and the second cable is at least partially wound in the second groove.

[0010] According to one embodiment of the utility model, the first wheel is also provided with a first snap-in groove corresponding to the first groove and a second snap-in groove corresponding to the second groove, the second snap-in groove is circumferentially spaced from the first snap-in groove, one end of the first cable has a first end head arranged in the first snap-in groove, and the second cable has a second end head arranged in the second snap-in groove.

[0011] According to one embodiment of the utility model, the first wheel is provided with first elongated holes extending along the circumference of the first wheel at the side walls corresponding to the first clamping groove, and the first end head is provided with first shafts extending outward at both ends of its axial direction, and the first shafts can slide in the corresponding first elongated holes respectively.

[0012] According to an embodiment of the present invention, the coupling device further comprises a sensor and an actuator disposed on the output shaft of the motor, wherein the actuator is configured to trigger the sensor when the output shaft rotates to a position where the second wheel engages with the first wheel.

[0013] According to one embodiment of the utility model, the first wheel assembly further includes a first reset member, which is arranged on a side of the first wheel away from the second wheel, and the second wheel assembly further includes a second reset member, which is arranged on a side of the second wheel away from the first wheel.

[0014] According to one embodiment of the utility model, the second wheel is provided with a third groove and a third clamping groove extending along its circumference, the third cable is at least partially wound in the third groove, and one end of the third cable has a third terminal end arranged in the third clamping groove.

[0015] According to one embodiment of the utility model, the second wheel is provided with a third elongated hole extending along the circumference of the second wheel on the side walls corresponding to the third clamping groove, and the third end is provided with a third shaft along its axial direction, and the third shaft can slide in the third elongated hole.

[0016] According to another aspect of the utility model, a motor vehicle door lock is provided, which includes an outer control part, an inner control part, a door lock body and a connecting device as described above, wherein the first cable is connected to the inner control part, the second cable is connected to the door lock body, and the third cable is connected to the outer control part.

[0017] The coupling device for a motor vehicle door lock of the utility model can be used together with a door lock body, and the engagement of the first wheel and the second wheel is controlled by a control component of the coupling device, so that whether the door lock body can be unlocked by an outer control member can be controlled, and the unlocking function of an outer control member such as an outer door handle can be conveniently controlled with a simple structure, which can meet the different configuration requirements of users, save costs, reduce structural complexity, reduce the volume of the product, and improve versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The features and advantages of the present invention will be clearly understood through the detailed description provided below with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and thus cannot be regarded as limiting the present invention, wherein:

[0019] Figure 1 A schematic diagram of a motor vehicle door lock according to an exemplary embodiment of the present invention is shown.

[0020] Figure 2 A three-dimensional schematic diagram of a coupling device according to an exemplary embodiment of the present utility model is shown.

[0021] Figure 3 Show Figure 2 An exploded schematic diagram of the coupling device is shown.

[0022] Figure 4 Show Figure 2 A perspective schematic diagram of the first wheel of the coupling device is shown.

[0023] Figure 5 Show Figure 2A perspective schematic diagram of the second wheel of the coupling device shown.

[0024] Description of reference numerals:

[0025] 1. Door lock body; 2. First wheel assembly; 21. First wheel; 211. First groove; 212. Second groove; 213. First clamping groove; 214. Second clamping groove; 215. First long hole; 216. Second long hole; 22. First cable; 221. First terminal; 2211. First shaft; 23. Second cable; 231. Second terminal; 2311. Second shaft; 24. First reset member; 3. Second wheel assembly Part; 31, second wheel; 311, third groove; 312, third snap-in groove; 313, third long hole; 32, third cable; 321, third terminal; 3211, third shaft; 33, second reset part; 4, control assembly; 41, motor; 42, cam; 43, third reset part; 44, sensor; 45, actuator; 5, key portion; 6, keyway; 7, outer control part; 8, inner control part; 9, connecting device. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, many specific details are set forth so that those skilled in the art can more fully understand and implement the present invention. However, it is obvious to those skilled in the art that the implementation of the present invention may not have some of these specific details. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, any combination of the features and elements described below may be considered to implement the present invention, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments and advantages are for illustrative purposes only and should not be regarded as elements or limitations of the claims unless clearly stated in the claims.

[0027] In the following, terms such as "first", "second", etc. are used to describe the elements of the present invention. These terms are only used to distinguish the elements, but are not used to limit the nature, order or number of these elements. The terms "including" and "having" are used to express open-ended inclusion and mean that there may be additional elements / components in addition to the listed elements / components.

[0028] Figure 1The motor vehicle door lock according to an embodiment of the utility model is shown, and the motor vehicle door lock may include an outer control member 7, an inner control member 8, a door lock body 1 and a connecting device 9. The outer control member 7 may be a door handle or button disposed on the outer side of the vehicle door or the outer surface of the vehicle body, and is used to open the vehicle door from the outer side of the vehicle door. The inner control member 8 may be a door handle or button disposed on the inner side of the vehicle door or the inner surface of the vehicle body, and is used to open the vehicle door from the inner side of the vehicle door. The door lock body is connected to the outer control member 7 and the inner control member 8 respectively through the connecting device 9, so that by switching the connecting device 9, it can be controlled whether the door lock body 1 can be unlocked by the inner control member 8 and / or the outer control member 7.

[0029] Figure 2 and Figure 3 A coupling device 9 according to an embodiment of the utility model is shown. The coupling device 9 according to this embodiment may include a first wheel assembly 2, a second wheel assembly 3 and a control assembly 4. The control assembly 4 includes a motor 41, which will be further described below. The coupling device 9 can be electrically operated by the motor 41, and therefore can also be referred to as an electric coupling device, which can, for example, be constructed as a structure of an electric coupling box (the box body is not shown in the figure). The first wheel assembly 2 may include a first wheel 21, a first cable 22 and a second cable 23. The first wheel 21 has a certain width along its axial direction, so that the first cable 22 and the second cable 23 can be arranged side by side on its outer periphery. At least a portion of the first cable 22 is arranged along the first direction ( Figure 2 H direction shown in the figure) is arranged around a portion of the first wheel 21 along its circumference, for example, Figure 2 The first wheel 21 shown in the figure is close to the outer side of the paper in the axial direction, and another part of the first cable 22 extends out of the first wheel 21 to be connected to the inner control member 8. At least a part of the second cable 23 is extended along the second direction ( Figure 1 The direction opposite to the H direction shown in FIG. 1 is wound around a portion of the first wheel 21 along its circumference, for example, Figure 2 On the side of the first wheel 21 inwardly close to the paper plane in the axial direction, another part of the second cable 23 extends out of the first wheel 21 to be connected to the door lock body 1. Thus, the first cable 22 and the second cable 23 are arranged side by side on the outer periphery of the first wheel 21 and are respectively wound around the first wheel 21 in opposite directions. The first cable 22 is suitable for being connected to the inner control member 8, and the second cable 23 is suitable for being connected to the door lock body 1, so that when the first cable 22 is pulled to rotate the first wheel 21 in the first direction, the second cable 23 is driven and pulls the door lock body 1 to unlock.

[0030] The second wheel assembly 3 may include a second wheel 31 and a third cable 32. The second wheel 31 is coaxially arranged with the first wheel 21 and is configured to be engaged with the first wheel 21, so that it can rotate synchronously with the first wheel 21 when engaged with the first wheel 21. At least a portion of the third cable 32 is rotated in the first direction ( Figure 2 The third cable 32 is arranged in the same direction as the first cable 22. When the second wheel 31 is engaged with the first wheel 21 and the third cable 32 is pulled by the outer control member 7 to rotate the second wheel 31 and the first wheel 21 engaged therewith in the first direction, the door lock body 1 is unlocked. The control assembly 4 is connected to the second wheel 31, and can control the second wheel 31 and the first wheel 21 to switch between the engaged state and the non-engaged state. For example, when the second wheel 31 and the first wheel 21 are in the non-engaged state, the unlocking of the door lock body 1 can only be controlled by the first cable 22 (inside control member 8). When the second wheel 31 and the first wheel 21 are in the engaged state, the unlocking of the door lock body 1 can be controlled by the first cable 22 (inside control member 8) and the third cable 32 (outside control member 7).

[0031] The utility model directly arranges the connecting device 9 on the door lock body 1, and controls the engagement of the first wheel 21 and the second wheel 31 through the control component 4 of the connecting device 9, so as to control whether the door lock body 1 can be unlocked through the outer control member 7, thereby providing a safety lock function with a simple structure and reducing costs.

[0032] In order to ensure the synchronous rotation of the first wheel 21 and the second wheel 31 in the engaged state, one of the first wheel 21 and the second wheel 31 (the first wheel 21 in the embodiment shown in the drawings) is provided with a Figure 3 The first wheel 21 shown in the figure has a key portion 5 protruding along its axial direction toward the second wheel 31. Figure 4 As shown, the key portion 5 may be provided with at least one groove recessed radially inwardly along its circumference or at intervals. The other of the first wheel 21 and the second wheel 31 (the second wheel 31 in the embodiment shown in the drawings) is provided with a groove recessed radially inwardly along the axis ( Figure 3 The second wheel 31 shown has a recessed keyway 6 in the direction away from the first wheel 21. Figure 5 As shown, the keyway 6 can be provided with at least one protrusion protruding radially inward along its circumference or at intervals, and each protrusion can be embedded in the groove on the key portion 5 one by one, so that the key portion 5 can be inserted into the keyway 6 so that the first wheel 21 and the second wheel 31 can be engaged and rotate synchronously.

[0033] According to an exemplary embodiment of the control assembly 4, reference Figure 3As shown, the control assembly 4 may include a motor 41 and a cam 42 connected to the output shaft of the motor 41. The motor 41 is disposed on one side of the second wheel 31, and the wheel surface of the cam 42 abuts against the surface of the second wheel 31 on one side away from the first wheel 21. The cam 42 rotates with the output shaft of the motor 41, so that the distance between the second wheel 31 and the output shaft of the motor 41 changes with the forward (or reverse) rotation of the cam 42, thereby driving the second wheel 31 to move toward the first wheel 21, and allowing the key portion 5 to be inserted into the key slot 6.

[0034] Further, refer to Figure 2 and Figure 3 The control assembly 4 may further include a sensor 44 and an actuator 45 disposed on the output shaft of the motor 41. The sensor 44 may be an electronic component such as a micro switch that can be electrically connected to the control system of the motor vehicle, so as to feedback a signal to the dashboard or to the user in the form of an indicator light, so as to indicate the engagement state of the first wheel 21 and the second wheel 31 and further indicate whether the outer control member 7 can be used for unlocking. The actuator 45 may be fan-shaped as a whole and coaxially connected to the output shaft of the motor 41 with the cam 42, and the actuator 45 may rotate synchronously with the cam 42. When the maximum wheel diameter of the cam 42 abuts against the second wheel 31, the second wheel 31 engages with the first wheel 21, and the periphery of the actuator 45 can trigger the sensor 44. When the minimum wheel diameter of the cam 42 abuts against the second wheel 31 or the cam 42 and the second wheel 31 are released from abutment, the actuator 45 disengages from the sensor 44 or stops triggering the sensor 44.

[0035] Further, continue to refer to Figure 3 The control assembly 4 may further include a third reset member 43 connected to the second wheel 31 and extending to be connected to the first wheel 21. The third reset member 43 may be an elastic component such as a spring. When the first wheel 21 and the second wheel 31 are in a non-engaged state, the third reset member 43 can be in a natural length or slightly compressed state. When the first wheel 21 and the second wheel 31 are in an engaged state, the length of the third reset member 43 is compressed, thereby generating elastic potential energy due to being squeezed by the first wheel 21 and the second wheel 31. When the first wheel 21 and the second wheel 31 are switched from the engaged state to the non-engaged state, the elastic potential energy of the third reset member 43 moves the second wheel 31 in a direction away from the first wheel 21, thereby enabling the key portion 5 and the key slot 6 to be disengaged.

[0036] According to an exemplary embodiment of the first round 21, reference Figure 4The first wheel 21 is provided with a first groove 211 and a second groove 212 arranged side by side along its axial direction, and the first groove 211 and the second groove 212 are respectively arranged to penetrate the circumference of the first wheel 21. The first cable 22 is at least partially wound in the first groove 211. The second cable 23 is at least partially wound in the second groove 212. It can be understood that at least partially wound means that at least a part of the first cable 22 or the second cable 23 is snugly arranged in the first groove 211 or the second groove 212, and extends along the groove for a distance and then extends along the tangential direction of the first wheel 21, so as to facilitate the part extending out of the groove to be connected to the inner control member 8 or the door lock body 1 respectively.

[0037] Further, in order to stably connect the first cable 22 and the second cable 23 to the first wheel 21, continue to refer to Figure 4 , the first wheel 21 may also be provided with a first snap-in groove 213 corresponding to the first groove 211. The end of the first cable 22 disposed in the first groove 211 has a first terminal 221, and the first terminal 221 is disposed in the first snap-in groove 213, so that one end of the first cable 22 is fixed in the first snap-in groove 213, and the other end of the first cable 22 can extend along the first groove 211 for a distance and then extend out of the first groove 211. Similarly, the first wheel 21 may also be provided with a second snap-in groove 214 corresponding to the second groove 212, and the end of the second cable 23 disposed in the second groove 212 has a second terminal 231, and the second terminal 231 is disposed in the second snap-in groove 214, so that one end of the second cable 23 is fixed in the second snap-in groove 214, and the other end can extend along the second groove 212 for a distance and then extend out of the second groove 212. The second snap-in groove 214 is disposed circumferentially spaced apart from the first snap-in groove 213. For example, in a case such as Figure 4 The first clamping slot 213 and the second clamping slot 214 are arranged opposite to each other. The first end 221 is arranged in the first clamping slot 213 and the first cable 22 extends to the position where the second clamping slot 214 is located. The second end 231 is arranged in the second clamping slot 214 and the second cable 23 extends to the position where the first clamping slot 213 is located, so that the free ends of the first cable 22 and the second cable 23 are as shown. Figure 2 The arrangement shown has an angle of approximately 90°, the free end of the second cable 23 is connected to the door lock body 1 , and the first cable 22 is connected to the inside control member 8 .

[0038] In order to place the first terminal 221 and the second terminal 231, as Figure 3 , 4As shown, the depths of the first clamping groove 213 and the second clamping groove 214 are respectively deeper than the depths of the first groove 211 and the second groove 212, and the first wheel 21 is respectively provided with first elongated holes 215 extending along the circumferential direction of the first wheel 21 on two opposite side walls corresponding to the first clamping groove 213. The axial direction of the first end 221 is parallel to the axial direction of the first wheel 21, and the first end 221 is respectively provided with first shafts 2211 extending outward at both ends along the axial direction thereof, and the two first shafts 2211 are respectively accommodated in the corresponding arc-shaped first elongated holes 215. When the first wheel 21 and the second wheel 31 are engaged, and the outer control member 7 is operated to pull the third cable 32 and then drive the second wheel 31 and the first wheel 21 to rotate, the second cable 23 is pulled to unlock the door lock body 1, and at the same time, since the first shaft 2211 on the first end 221 of the first cable 22 can slide in the first elongated hole 215, the second cable 22 can be driven without being driven by the rotation of the first wheel 21. In other words, the arrangement of the arc-shaped first elongated hole 215 makes it possible for the actuation of the third cable 32 connected to the outer control member 7 not to affect the second cable 22 connected to the inner control member 8. The first wheel 21 is provided with second elongated holes 216 extending along the circumference of the first wheel 21 on two opposite side walls corresponding to the second clamping groove 214. The axial direction of the second end 231 is also parallel to the axial direction of the first wheel 21. The second end 231 is provided with second shafts 2311 extending outward at both ends along its axial direction, and the two second shafts 2311 are respectively accommodated in the corresponding arc-shaped second elongated holes 216. The provision of the second elongated holes 216 facilitates the assembly of the second end 231 of the second cable 23.

[0039] Further, the second wheel 31 is provided with a third groove 311 extending along the circumference thereof, and is also provided with a third clamping groove 312 corresponding to the third groove 311. The third cable 32 is at least partially wound in the third groove 311, and one end of the third cable 32 has a third terminal 321 arranged in the third clamping groove 312. The depth of the third clamping groove 312 is greater than the depth of the third groove 311. Thus, the third terminal 321 is clamped in the third clamping groove 312, the third cable 32 extends along the third groove 311, and the end of the third cable 32 away from the third terminal 321 can extend out of the third groove 311 and be connected to the outer control member 7.

[0040] Further, two side walls of the second wheel 31 corresponding to the third clamping groove 312 are respectively provided with arc-shaped third elongated holes 313 extending along the circumferential direction of the second wheel 31. The axial direction of the third end 321 is parallel to the axial direction of the second wheel 31, and the two ends of the third end 321 are respectively provided with third shafts 3211 extending outward along the axial direction thereof. The third shafts 3211 extend into the third elongated holes 313 one by one and can slide in the third elongated holes 313. When the first wheel 21 and the second wheel 31 are engaged and the first cable 22 is used to rotate the first wheel 21, thereby driving the second wheel 31 to rotate, the third end 321 slides in the third elongated holes 313, so that the third cable 32 can be driven without being driven by the rotation of the second wheel 31. In other words, the provision of the arc-shaped third elongated holes 313 makes it possible for the actuation of the second cable 22 connected to the inner control member 8 not to affect the third cable 32 connected to the outer control member 7.

[0041] Furthermore, the first wheel assembly 2 may further include a first reset member 24. Figure 3 As shown, the first reset member 24 is disposed on the side of the first wheel 21 away from the second wheel 31 ( Figure 3 The first return member 24 is on the left side of the first wheel 21 along its axial direction as shown, and is used for resetting the first wheel 21 after rotation. It can be understood that the first return member 24 can be a torsion spring, and elastic potential energy is generated by deformation of the first return member 24 when the first wheel 21 rotates.

[0042] According to a further exemplary embodiment of the second wheel assembly 3, Figure 3 and Figure 5 As shown, the second wheel assembly 3 may further include a second reset member 33, which is disposed on a side of the second wheel 31 away from the first wheel 21 ( Figure 3 The second reset member 33 is on the right side of the second wheel 31 along its axial direction as shown, and is used for resetting the second wheel 31 after rotation. It can be understood that the second reset member 33 can be a torsion spring, and elastic potential energy is generated by deformation of the second reset member 33 when the second wheel 31 rotates.

[0043] The utility model also provides a motor vehicle door lock including the above-mentioned coupling device 9. The motor vehicle door lock conveniently realizes the control of the unlocking function of the outer control member such as the door handle with a simple structure, meets the needs of users, saves costs, and reduces structural complexity.

[0044] For those skilled in the art, various modifications and variations may be made to the embodiments disclosed above without departing from the scope or spirit of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from the practice of the utility model disclosed in this specification. This specification and the examples disclosed therein should be considered to be illustrative only, and the true scope of the utility model is specified by the appended claims and their equivalents.

Claims

1. A coupling device (9) for a motor vehicle door lock, the door lock comprising a door lock body (1), characterized in that: include: A first wheel assembly (2), the first wheel assembly (2) comprising a first wheel (21), a first cable (22) at least partially wound around the first wheel (21) along a first direction, and a second cable (23) at least partially wound around the first wheel (21) along a second direction, the second direction being the opposite direction of the first direction, the first cable (22) being suitable for being connected to an inner control member (8) for controlling the door lock body (1), and the second cable (23) being suitable for being connected to the door lock body (1); a second wheel assembly (3), the second wheel assembly (3) comprising a second wheel (31) and a third cable (32) at least partially wound around the second wheel (31) along the first direction, the second wheel (31) being coaxially arranged with the first wheel (21) and being configured to be engageable with the first wheel (21), the third cable (32) being adapted to be connected to an outer control member (7) for controlling the door lock body (1); as well as a control assembly (4), the control assembly (4) being coupled to the second wheel (31) to control the engagement of the second wheel (31) with the first wheel (21); When the second wheel (31) is engaged with the first wheel (21), the movement of the third cable (32) can be transmitted to the door lock body (1).

2. The coupling device (9) according to claim 1, characterized in that One of the first wheel (21) and the second wheel (31) is provided with a key portion (5) protruding outwardly along the axial direction, and the other is provided with a key groove (6) recessed inwardly along the axial direction, and the key portion (5) is inserted into the key groove (6) so that the first wheel (21) and the second wheel (31) are engaged and rotate synchronously.

3. The coupling device (9) according to claim 2, characterized in that The control assembly (4) comprises a motor (41) arranged on one side of the second wheel (31) and a cam (42) connected to an output shaft of the motor (41); the cam (42) abuts against a surface of a side of the second wheel (31) away from the first wheel (21) to drive the second wheel (31) to move toward the first wheel (21) and to insert the key portion (5) into the key slot (6).

4. The coupling device (9) according to claim 3, characterized in that The control assembly (4) further comprises a third reset member (43) connected between the first wheel (21) and the second wheel (31), wherein the third reset member (43) is configured to disengage the key portion (5) and the key slot (6) in an engaged state.

5. The coupling device (9) according to any one of claims 1 to 4, characterized in that The first wheel (21) is provided with a first groove (211) and a second groove (212) extending along its circumferential direction side by side along its axial direction; the first cable (22) is at least partially wound in the first groove (211); and the second cable (23) is at least partially wound in the second groove (212).

6. The coupling device (9) according to claim 5, characterized in that The first wheel (21) is also provided with a first snap-in groove (213) corresponding to the first groove (211) and a second snap-in groove (214) corresponding to the second groove (212); the second snap-in groove (214) is spaced apart from the first snap-in groove (213) in the circumferential direction; one end of the first cable (22) has a first terminal (221) arranged in the first snap-in groove (213); and one end of the second cable (23) has a second terminal (231) arranged in the second snap-in groove (214).

7. The coupling device (9) according to claim 6, characterized in that The first wheel (21) is provided with first elongated holes (215) extending along the circumference of the first wheel (21) at both side walls corresponding to the first clamping groove (213), and the first end head (221) is provided with first shafts (2211) extending outwards at both ends of its axial direction, and the first shaft (2211) can slide in the corresponding first elongated holes (215).

8. The coupling device (9) according to claim 3, characterized in that The control assembly (4) further comprises a sensor (44) and an actuator (45) arranged on the output shaft of the motor (41), wherein the actuator is configured to trigger the sensor when the output shaft rotates to a position where the second wheel (31) engages with the first wheel (21).

9. The coupling device (9) according to any one of claims 1 to 4, characterized in that The first wheel assembly (2) further comprises a first reset member (24), the first reset member (24) being arranged on a side of the first wheel (21) facing away from the second wheel (31), and the second wheel assembly (3) further comprises a second reset member (33), the second reset member (33) being arranged on a side of the second wheel (31) facing away from the first wheel (21).

10. The coupling device (9) according to any one of claims 1 to 4, characterized in that The second wheel (31) is provided with a third groove (311) and a third clamping groove (312) extending along its circumference; the third cable (32) is at least partially wound in the third groove (311); one end of the third cable (32) has a third terminal (321) arranged in the third clamping groove (312).

11. The coupling device (9) according to claim 10, characterized in that The second wheel (31) is provided with third elongated holes (313) extending along the circumference of the second wheel (31) at both side walls corresponding to the third clamping groove (312), and the third end head (321) is provided with third shafts (3211) extending outwards at both ends of its axial direction, and the third shaft (3211) can slide in the corresponding third elongated holes (313).

12. A motor vehicle door lock, characterized in that: It comprises an outer control part (7), an inner control part (8), a door lock body (1) and a connecting device (9) according to any one of claims 1 to 11, wherein the first cable (22) is connected to the inner control part (8), the second cable (23) is connected to the door lock body (1), and the third cable (32) is connected to the outer control part (7).

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